wp-block-code doesn't add proper spaces but unicode variants

[Digiover]

Description

When adding an space in a wp-block-code block, it doesn't add a space but something unicode that looks like an space. This is annoying when copy-pasting code back and forth. It's always something with Gutenberg (see 56855)

Step-by-step reproduction instructions

1. Start a new post
2. add a wp-block-code block
3. write or paste in your code
4. add spaces
5. copy-paste the code into an editor/IDE like Visual Studio Code. It'll complain:

The character U+2003 is not a basic ASCII character.

Screenshots, screen recording, code snippet

Environment info

• WordPress version: WordPress 6.4.3
• Gutenberg version (plugin): 17.6.0
• running Hester theme version 1.1.4.

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[t-hamano]

Thanks for the report. I would like to close this issue as it has been summarized in #58659.